Abstract
A prospecting method used in 1975 in Greenland and reported briefly on here measures the total cold extractable amount of seven heavy metals, Zn, Pb, Cu, Co, Ni, Sn and Ag. The primary aim of the method is to discover and outline metal anomalies but not to determine their metal content accurateIy. Once an anomaly is targeted this can be done by more detailed foIlow-up surveys. The two areas chosen to test the suitability of the method to Greenland conditions, were the lead-zinc mining district of Mesters Vig on the east coast and the Sorte Engel (Black Angel) mine at MârmoriIik on the west coast. The traverses run show strong anomalies over kriown veins (figs 37 & 38, AA' & CC'; fig. 39, GG' & HH'), as well as indicatingpreviously unknown mineralisation (fig. 38, BB'; the western anomaly in fig. 39, HH').
Highlights
A prospecting method used in 1975 in Greenland and reported briefly on here measures the total cold extractable amount of seven heavy metals, Zn, Pb, Cu, Co, Ni, Sn and Ag
The primary aim of the method is to discover and outline metal anomalies but not to determine their metal content accurateIy. lance an anomaly is targeted this can be done by more detailed foIlow-up surveys. , ', The two areas chosen to test the suitability of the method to Greenland conditions, were the lead-zinc mining district of Mesters Vig on the east coast and the Sorte Engel (Black Angel) mine at MårmoriIik on the west coast
The sample is dropped in the ammonium citrate and dithizone solution and shaken for 15 seconds
Summary
The cold extraction kit fits into an aluminium box the size of a camera bag, and with reagents weighs about l kg. The sample is dropped in the ammonium citrate and dithizone solution and shaken for 15 seconds. DissoIved metal in the sample changes the colour ofthe standard green dithizone solution, making it light blue, indigo, purple, pink, and red, with increasing amounts of metal. To measure the dissolved metal ~ontent, dithizone is added to the sample solution until the colour is brought back to the end-point blue-green. Due to pressure oftime or lack of sufficient field solution, many of the anomalous readings in the traverses shown (as in GG' and HH') were not carried to end-point blue-green. Even these quick and scattered samples show c1earcorrelations with the known sulphide outcrops
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